Technical Product Specification

Intel® Server System SR1560SF TPS Power Sub-System
Revision 1.2
Intel order number D92959-006
19
3.4.3 AC Line Fast Transient (EFT) Specification
The power supply meets the EN61000-4-5 directive and any additional requirements in
IEC1000-4-5:1995 and the Level 3 requirements for surge-withstand capability, with the
following conditions and exceptions:
 These input transients must not cause any out-of-regulation conditions, such as
overshoot and undershoot, nor must it cause any nuisance trips of any of the power
supply protection circuits.
 The surge-withstand test must not produce damage to the power supply.
The supply meets surge-withstand test conditions under maximum and minimum DC-output
load conditions.
3.4.4 AC Line Dropout/Holdup
Table 16. AC Line Holdup time
Loading Holdup time
80% 20msec
100% 12msec
An AC line dropout is defined to be when the AC input drops to 0VAC at any phase of the AC
line for any length of time. During an AC dropout the power supply must meet dynamic voltage
regulation requirements. An AC line dropout of any duration shall not cause tripping of control
signals or protection circuits. If the AC dropout lasts longer than the hold up time the power
supply should recover and meet all turn on requirements. The power supply shall meet the AC
dropout requirement over rated AC voltages and frequencies. A dropout of the AC line for any
duration shall not cause damage to the power supply.
3.4.4.1 AC Line 5VSB Holdup
The 5VSB output voltage will stay in regulation under its full load (static or dynamic) during an
AC dropout of
70ms min (=5VSB holdup time) whether the power supply is in ON or OFF state
(PSON asserted or de-asserted).
3.4.5 Power Recovery
The power supply will recover automatically after an AC power failure. AC power failure is
defined to be any loss of AC power that exceeds the dropout criteria.
3.4.5.1 Voltage Brown Out
The power supply complies with the limits defined in EN55024: 1998 using the IEC 61000-4-
11:1995 test standard and performance criteria C defined in Annex B of CISPR 24.
In addition the power supply meets the following Intel Requirements:
A continuous input voltage below the nominal input range shall not damage the power supply or
cause overstress to any power supply component. The power supply must be able to return to
normal power up state after a brownout condition. Maximum input current under a continuous